Article

Transition Metal Chemistry

, Volume 38, Issue 2, pp 157-163

Synthesis, structures, and photoluminescence properties of three metal(II) coordination polymers derived from a flexible tripodal ligand and 2,6-pyridinedicarboxylic acid

  • Shi-Meng WangAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University
  • , Ling QianAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University
  • , Hong-Ye BaiAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University
  • , Wei-Qiang FanAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University
  • , Chun-Bo LiuAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University
  • , Guang-Bo CheAffiliated withSchool of Chemistry and Chemical Engineering, Jiangsu University Email author 

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Abstract

Using a flexible tripodal ligand N,N′,N″-tris(3-pyridyl)-1,3,5-benzenetricarboxamide and 2,6-pyridinedicarboxylic acid, three metal(II) complexes formulated as [Co(pydc)(L)] n (1), [Zn(pydc)(L)] n (2), {[Ni(pydc)(L)]·2H2O} n (3) (L = N,N′,N″-tris(3-pyridyl)-1,3,5-benzenetricarboxamide, H2pydc = 2,6-pyridinedicarboxylic acid) have been hydrothermally synthesized and structurally characterized by physico-chemical and spectroscopic methods and single-crystal diffraction. In compounds 1 and 2, the L ligands acts as bridges to link the metal atoms into zigzag chain structures, which are further extended into three-dimensional (3D) metal–organic supramolecular frameworks by hydrogen bond interactions. In compound 3, the L ligands link three Ni(II) centers to form a two-dimensional (2D) hcb layered structure, and then, the adjacent nets interweave in parallel to generate a 3D structure by 2D → 3D interpenetration. The thermal stabilities of 13 and the luminescent properties of 2 in the solid state are also discussed.

Graphical Abstract

Three metal(II) coordination polymers, based on a flexible ligand N,N′,N″-tris(3-pyridyl)-1,3,5-benzenetricarboxamide and 2,6-pyridinedicarboxylic acid, have been successfully synthesized under hydrothermal conditions, where thermal and photoluminescent properties were also investigated.
http://static-content.springer.com/image/art%3A10.1007%2Fs11243-012-9673-5/MediaObjects/11243_2012_9673_Figa_HTML.gif

Keywords

Coordination polymers Flexible ligands Luminescence